The official National Weather Service forecast for Coffeyville — 37.0373°N, 95.6164°W, population 9,391, 96.7 miles from I-35.
| Montgomery County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 45 | 50 | 60 | 70 | 78 | 87 | 91 | 91 | 84 | 72 | 60 | 48 | 70 |
| Avg low °F | 24 | 27 | 37 | 46 | 56 | 66 | 70 | 68 | 60 | 48 | 37 | 28 | 47 |
| Precip in | 1.5 | 1.7 | 3.0 | 4.2 | 6.3 | 5.6 | 3.6 | 3.9 | 3.6 | 3.9 | 2.3 | 1.7 | 41.3 |
1996–2025 normals for Montgomery County — the climate division Coffeyville sits in. All-time county record high 114.2°F (1954-07-14); record low -15.9°F (2011-02-10). Source: NOAA / National Weather Service.